After upgrading to bookworm the display output for some monitors shows no
output.  There are no errors and the system is working headless.
Tried on: Display Port monitor -- doesn't work no output
               non-smart tv -- doesn't work no output
              hdmi smart tv -- works

motherboard: mag tomahawk b550 wifi motherboard
gpu : amd rx6500 xt 4gb
cpu: ryzen 7 5800x

kernel:
Linux debian 6.0.0-4-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.0.8-1
(2022-11-11) x86_64 GNU/Linux

lspci:
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP
Bridge
00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP
Bridge
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP
Bridge
00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:05.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
Internal PCIe GPP Bridge 0 to bus[E:B]
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
PCIe Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
Internal PCIe GPP Bridge 0 to bus[E:B]
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev
61)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev
51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer
Data Fabric: Device 18h; Function 7
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD
Controller PM9A1/PM9A3/980PRO
02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 500 Series
Chipset USB 3.1 XHCI Controller
02:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] 500 Series
Chipset SATA Controller
02:00.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] 500 Series Chipset
Switch Upstream Port
03:08.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 43ea
03:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 43ea
29:00.0 Network controller: MEDIATEK Corp. MT7921K (RZ608) Wi-Fi 6E 80MHz
2a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE
Controller (rev 05)
2b:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL
Upstream Port of PCI Express Switch (rev c1)
2c:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL
Downstream Port of PCI Express Switch
2d:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Navi 24 [Radeon RX 6400/6500 XT/6500M] (rev c1)
2d:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21/23
HDMI/DP Audio Controller
2e:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc.
[AMD] Starship/Matisse PCIe Dummy Function
2f:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc.
[AMD] Starship/Matisse Reserved SPP
2f:00.1 Encryption controller: Advanced Micro Devices, Inc. [AMD]
Starship/Matisse Cryptographic Coprocessor PSPCPP
2f:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0
Host Controller
2f:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse
HD Audio Controller

Hi Timothy,

From the report is not entirely clear to me if you only updated
firmware-amd-graphics to the bookworm version (20221109-2) or updating
the system from bullseye to bookworm/testing. Which components were
updated?

To get an initial set of additonal information, can you pleae attach
the full kernel logs?

Regards,
Salvatore

The working version I'm running now the whole system was upgraded from
bullseye to bookworm.

The following are relevant logs I could find:
...

[drm] amdgpu kernel modesetting enabled.
[    3.773056] amdgpu: Ignoring ACPI CRAT on non-APU system
[    3.773057] amdgpu: Virtual CRAT table created for CPU
[    3.773063] amdgpu: Topology: Add CPU node
[    3.773157] amdgpu 0000:2d:00.0: vgaarb: deactivate vga console
[    3.773191] amdgpu 0000:2d:00.0: enabling device (0006 -> 0007)
[    3.773222] [drm] initializing kernel modesetting (BEIGE_GOBY
0x1002:0x743F 0x1462:0x5080 0xC1).
[    3.773228] [drm] register mmio base: 0xFCA00000
[    3.773229] [drm] register mmio size: 1048576
[    3.774953] [drm] add ip block number 0 <nv_common>
[    3.774954] [drm] add ip block number 1 <gmc_v10_0>
[    3.774954] [drm] add ip block number 2 <navi10_ih>
[    3.774955] [drm] add ip block number 3 <psp>
[    3.774955] [drm] add ip block number 4 <smu>
[    3.774956] [drm] add ip block number 5 <dm>
[    3.774956] [drm] add ip block number 6 <gfx_v10_0>
[    3.774956] [drm] add ip block number 7 <sdma_v5_2>
[    3.774957] [drm] add ip block number 8 <vcn_v3_0>
[    3.774965] amdgpu 0000:2d:00.0: amdgpu: Fetched VBIOS from VFCT
[    3.774966] amdgpu: ATOM BIOS: 113-V508MECH-2OC
[    3.774969] [drm] VCN(0) decode is enabled in VM mode
[    3.774969] amdgpu 0000:2d:00.0: amdgpu: Trusted Memory Zone (TMZ)
feature disabled as experimental (default)
[    3.774998] [drm] vm size is 262144 GB, 4 levels, block size is 9-bit,
fragment size is 9-bit
[    3.775009] amdgpu 0000:2d:00.0: BAR 2: releasing [mem
0x7ff0000000-0x7ff01fffff 64bit pref]
[    3.775011] amdgpu 0000:2d:00.0: BAR 0: releasing [mem
0x7fe0000000-0x7fefffffff 64bit pref]
[    3.775029] pcieport 0000:2c:00.0: BAR 15: releasing [mem
0x7fe0000000-0x7ff01fffff 64bit pref]
[    3.775030] pcieport 0000:2b:00.0: BAR 15: releasing [mem
0x7fe0000000-0x7ff01fffff 64bit pref]
[    3.775031] pcieport 0000:00:03.1: BAR 15: releasing [mem
0x7fe0000000-0x7ff01fffff 64bit pref]
[    3.775036] pcieport 0000:00:03.1: BAR 15: assigned [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775037] pcieport 0000:2b:00.0: BAR 15: assigned [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775038] pcieport 0000:2c:00.0: BAR 15: assigned [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775039] amdgpu 0000:2d:00.0: BAR 0: assigned [mem
0x900000000-0x9ffffffff 64bit pref]
[    3.775046] amdgpu 0000:2d:00.0: BAR 2: assigned [mem
0x880000000-0x8801fffff 64bit pref]
[    3.775054] pcieport 0000:00:03.1: PCI bridge to [bus 2b-2d]
[    3.775056] pcieport 0000:00:03.1:   bridge window [io  0xe000-0xefff]
[    3.775058] pcieport 0000:00:03.1:   bridge window [mem
0xfca00000-0xfccfffff]
[    3.775060] pcieport 0000:00:03.1:   bridge window [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775063] pcieport 0000:2b:00.0: PCI bridge to [bus 2c-2d]
[    3.775065] pcieport 0000:2b:00.0:   bridge window [io  0xe000-0xefff]
[    3.775068] pcieport 0000:2b:00.0:   bridge window [mem
0xfca00000-0xfcbfffff]
[    3.775071] pcieport 0000:2b:00.0:   bridge window [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775075] pcieport 0000:2c:00.0: PCI bridge to [bus 2d]
[    3.775077] pcieport 0000:2c:00.0:   bridge window [io  0xe000-0xefff]
[    3.775080] pcieport 0000:2c:00.0:   bridge window [mem
0xfca00000-0xfcbfffff]
[    3.775083] pcieport 0000:2c:00.0:   bridge window [mem
0x880000000-0x9ffffffff 64bit pref]
[    3.775092] amdgpu 0000:2d:00.0: amdgpu: VRAM: 4080M 0x0000008000000000
- 0x00000080FEFFFFFF (4080M used)
[    3.775093] amdgpu 0000:2d:00.0: amdgpu: GART: 512M 0x0000000000000000 -
0x000000001FFFFFFF
[    3.775093] amdgpu 0000:2d:00.0: amdgpu: AGP: 267894784M
0x0000008400000000 - 0x0000FFFFFFFFFFFF
[    3.775099] [drm] Detected VRAM RAM=4080M, BAR=4096M
[    3.775100] [drm] RAM width 64bits GDDR6
[    3.775127] [drm] amdgpu: 4080M of VRAM memory ready
[    3.775128] [drm] amdgpu: 16014M of GTT memory ready.
[    3.775134] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    3.775282] [drm] PCIE GART of 512M enabled (table at
0x00000080FEB00000).
[    3.775382] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_sos.bin
[    3.775403] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_ta.bin
[    3.775406] amdgpu 0000:2d:00.0: amdgpu: PSP runtime database doesn't
exist
[    3.775408] amdgpu 0000:2d:00.0: amdgpu: PSP runtime database doesn't
exist
[    6.072239] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_smc.bin
[    6.072248] amdgpu 0000:2d:00.0: amdgpu: STB initialized to 2048 entries
[    6.072300] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_dmcub.bin
[    6.072301] [drm] Loading DMUB firmware via PSP: version=0x02020013
[    6.072330] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_pfp.bin
[    6.072360] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_me.bin
[    6.072392] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_ce.bin
[    6.072416] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_rlc.bin
[    6.072452] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_mec.bin
[    6.072486] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_mec2.bin
[    6.072820] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_sdma.bin
[    6.072821] [drm] use_doorbell being set to: [true]
[    6.072904] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_vcn.bin
[    6.072905] [drm] Found VCN firmware Version ENC: 1.24 DEC: 2 VEP: 0
Revision: 0
[    6.072909] amdgpu 0000:2d:00.0: amdgpu: Will use PSP to load VCN
firmware
[    6.139421] [drm] reserve 0xa00000 from 0x80fd000000 for PSP TMR
[    6.236419] amdgpu 0000:2d:00.0: amdgpu: RAS: optional ras ta ucode is
not available
[    6.251444] amdgpu 0000:2d:00.0: amdgpu: SECUREDISPLAY: securedisplay ta
ucode is not available
[    6.251465] amdgpu 0000:2d:00.0: amdgpu: smu driver if version =
0x0000000d, smu fw if version = 0x0000000f, smu fw program = 0, version =
0x00491c00 (73.28.0)
[    6.251467] amdgpu 0000:2d:00.0: amdgpu: SMU driver if version not
matched
[    6.251498] amdgpu 0000:2d:00.0: amdgpu: use vbios provided pptable
[    6.292825] amdgpu 0000:2d:00.0: amdgpu: SMU is initialized successfully!
[    6.292916] [drm] Display Core initialized with v3.2.198!
[    6.293969] [drm] DMUB hardware initialized: version=0x02020013
[    6.297371] [drm] kiq ring mec 2 pipe 1 q 0
[    6.300452] [drm] VCN decode and encode initialized successfully(under
DPG Mode).
[    6.301660] kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    6.301747] amdgpu: sdma_bitmap: ff
[    6.301819] amdgpu: SRAT table not found
[    6.301820] amdgpu: Virtual CRAT table created for GPU
[    6.301903] amdgpu: Topology: Add dGPU node [0x743f:0x1002]
[    6.301904] kfd kfd: amdgpu: added device 1002:743f
[    6.301919] amdgpu 0000:2d:00.0: amdgpu: SE 1, SH per SE 2, CU per SH 8,
active_cu_number 16
[    6.301956] amdgpu 0000:2d:00.0: amdgpu: ring gfx_0.0.0 uses VM inv eng
0 on hub 0
[    6.301957] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng
1 on hub 0
[    6.301958] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng
4 on hub 0
[    6.301958] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng
5 on hub 0
[    6.301959] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng
6 on hub 0
[    6.301959] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng
7 on hub 0
[    6.301960] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng
8 on hub 0
[    6.301960] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng
9 on hub 0
[    6.301961] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng
10 on hub 0
[    6.301961] amdgpu 0000:2d:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng
11 on hub 0
[    6.301962] amdgpu 0000:2d:00.0: amdgpu: ring sdma0 uses VM inv eng 12
on hub 0
[    6.301962] amdgpu 0000:2d:00.0: amdgpu: ring vcn_dec_0 uses VM inv eng
0 on hub 1
[    6.302850] amdgpu 0000:2d:00.0: amdgpu: Using BACO for runtime pm
[    6.302968] [drm] Initialized amdgpu 3.48.0 20150101 for 0000:2d:00.0 on
minor 0
[    6.304834] amdgpu 0000:2d:00.0: [drm] Cannot find any crtc or sizes
[    6.304840] [drm] DSC precompute is not needed.
[    6.404192] raid6: avx2x4   gen() 33442 MB/s
[    6.072248] amdgpu 0000:2d:00.0: amdgpu: STB initialized to 2048 entries
[    6.072300] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_dmcub.bin
[    6.072301] [drm] Loading DMUB firmware via PSP: version=0x02020013
[    6.072330] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_pfp.bin
[    6.072300] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_dmcub.bin
[    6.072301] [drm] Loading DMUB firmware via PSP: version=0x02020013
[    6.072330] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_pfp.bin
[    6.072360] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_me.bin
[    6.072392] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_ce.bin
[    6.072416] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_rlc.bin
[    6.072452] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_mec.bin
[    6.072486] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_mec2.bin
[    6.072820] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_sdma.bin
[    6.072821] [drm] use_doorbell being set to: [true]
[    6.072904] amdgpu 0000:2d:00.0: firmware: direct-loading firmware
amdgpu/beige_goby_vcn.bin
[    6.072905] [drm] Found VCN firmware Version ENC: 1.24 DEC: 2 VEP: 0
Revision: 0
[    6.072909] amdgpu 0000:2d:00.0: amdgpu: Will use PSP to load VCN
firmware
[    6.139421] [drm] reserve 0xa00000 from 0x80fd000000 for PSP TMR
[    6.236419] amdgpu 0000:2d:00.0: amdgpu: RAS: optional ras ta ucode is
not available
[    6.251444] amdgpu 0000:2d:00.0: amdgpu: SECUREDISPLAY: securedisplay ta
ucode is not available
[    6.251465] amdgpu 0000:2d:00.0: amdgpu: smu driver if version =
0x0000000d, smu fw if version = 0x0000000f, smu fw program = 0, version =
0x00491c00 (73.28.0
)
[    6.251467] amdgpu 0000:2d:00.0: amdgpu: SMU driver if version not
matched
[    6.251498] amdgpu 0000:2d:00.0: amdgpu: use vbios provided pptable
[    6.292825] amdgpu 0000:2d:00.0: amdgpu: SMU is initialized successfully!
[    6.292916] [drm] Display Core initialized with v3.2.198!
[    6.293969] [drm] DMUB hardware initialized: version=0x02020013
[    6.297371] [drm] kiq ring mec 2 pipe 1 q 0
[    6.300452] [drm] VCN decode and encode initialized successfully(under
DPG Mode).
[    6.301660] kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    6.301747] amdgpu: sdma_bitmap: ff
[    6.301819] amdgpu: SRAT table not found
[    6.301820] amdgpu: Virtual CRAT table created for GPU
[    6.301903] amdgpu: Topology: Add dGPU node [0x743f:0x1002]
[    6.301904] kfd kfd: amdgpu: added device 1002:743f
[    6.301919] amdgpu 0000:2d:00.0: amdgpu: SE 1, SH per SE 2, CU per SH 8,
active_cu_number 16
[    6.301956] amdgpu 0000:2d:00.0: amdgpu: ring gfx_0.0.0 uses VM inv eng
0 on hub 0
[    6.301957] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng
1 on hub 0
[    6.301958] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng
4 on hub 0
[    6.301958] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng
5 on hub 0
[    6.301959] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng
6 on hub 0
[    6.301959] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng
7 on hub 0
[    6.301960] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng
8 on hub 0
[    6.301960] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng
9 on hub 0
[    6.301961] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng
10 on hub 0
[    6.301961] amdgpu 0000:2d:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng
11 on hub 0
[    6.301962] amdgpu 0000:2d:00.0: amdgpu: ring sdma0 uses VM inv eng 12
on hub 0
[    6.301962] amdgpu 0000:2d:00.0: amdgpu: ring vcn_dec_0 uses VM inv eng
0 on hub 1
[    6.302850] amdgpu 0000:2d:00.0: amdgpu: Using BACO for runtime pm
[    6.302968] [drm] Initialized amdgpu 3.48.0 20150101 for 0000:2d:00.0 on
minor 0
[    6.304834] amdgpu 0000:2d:00.0: [drm] Cannot find any crtc or sizes
[    6.304840] [drm] DSC precompute is not needed.

...

[   78.775212] [drm] PCIE GART of 512M enabled (table at
0x00000080FEB00000).
[   78.775230] [drm] PSP is resuming...
[   78.842290] [drm] reserve 0xa00000 from 0x80fd000000 for PSP TMR
[   78.849930] audit: type=1400 audit(1669405452.416:31): apparmor="DENIED"
operation="open" profile="/usr/sbin/cups-browsed"
name="/proc/sys/net/ipv6/conf/all/d
isable_ipv6" pid=1272 comm="cups-browsed" requested_mask="r"
denied_mask="r" fsuid=0 ouid=0
[   78.938278] amdgpu 0000:2d:00.0: amdgpu: RAS: optional ras ta ucode is
not available
[   78.953267] amdgpu 0000:2d:00.0: amdgpu: SECUREDISPLAY: securedisplay ta
ucode is not available
[   78.953270] amdgpu 0000:2d:00.0: amdgpu: SMU is resuming...
[   78.953273] amdgpu 0000:2d:00.0: amdgpu: smu driver if version =
0x0000000d, smu fw if version = 0x0000000f, smu fw program = 0, version =
0x00491c00 (73.28.0
)
[   78.953275] amdgpu 0000:2d:00.0: amdgpu: SMU driver if version not
matched
[   78.953323] amdgpu 0000:2d:00.0: amdgpu: use vbios provided pptable
[   78.960481] amdgpu 0000:2d:00.0: amdgpu: SMU is resumed successfully!
[   78.961567] [drm] DMUB hardware initialized: version=0x02020013
[   78.992689] [drm] kiq ring mec 2 pipe 1 q 0
[   78.996006] [drm] VCN decode and encode initialized successfully(under
DPG Mode).
[   78.996022] amdgpu 0000:2d:00.0: amdgpu: ring gfx_0.0.0 uses VM inv eng
0 on hub 0
[   78.996023] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng
1 on hub 0
[   78.996024] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng
4 on hub 0
[   78.996024] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng
5 on hub 0
[   78.996025] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng
6 on hub 0
[   78.996025] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng
7 on hub 0
[   78.996026] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng
8 on hub 0
[   78.996026] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng
9 on hub 0
[   78.996027] amdgpu 0000:2d:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng
10 on hub 0
[   78.996027] amdgpu 0000:2d:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng
11 on hub 0
[   78.996028] amdgpu 0000:2d:00.0: amdgpu: ring sdma0 uses VM inv eng 12
on hub 0
[   78.996028] amdgpu 0000:2d:00.0: amdgpu: ring vcn_dec_0 uses VM inv eng
0 on hub 1
[   78.997710] amdgpu 0000:2d:00.0: [drm] Cannot find any crtc or sizes
[   78.997713] amdgpu 0000:2d:00.0: [drm] Cannot find any crtc or sizes


022-11-25T15:10:19.020538-05:00 debian /usr/libexec/gdm-x-session[11179]:
xf86EnableIO: failed to enable I/O ports 0000-03ff (Operation not permitted)
2022-11-25T15:10:19.020551-05:00 debian /usr/libexec/gdm-x-session[11179]:
(WW) Falling back to old probe method for modesetting
2022-11-25T15:10:19.020565-05:00 debian /usr/libexec/gdm-x-session[11179]:
(WW) Falling back to old probe method for fbdev
2022-11-25T15:10:19.020578-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) Loading sub module "fbdevhw"
2022-11-25T15:10:19.020594-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) LoadModule: "fbdevhw"
2022-11-25T15:10:19.020618-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) Loading /usr/lib/xorg/modules/libfbdevhw.so
2022-11-25T15:10:19.020633-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) Module fbdevhw: vendor="X.Org Foundation"
2022-11-25T15:10:19.020649-05:00 debian /usr/libexec/gdm-x-session[11179]:
#011compiled for 1.21.1.4, module version = 0.0.2
2022-11-25T15:10:19.020663-05:00 debian /usr/libexec/gdm-x-session[11179]:
#011ABI class: X.Org Video Driver, version 25.2
2022-11-25T15:10:19.020677-05:00 debian /usr/libexec/gdm-x-session[11179]:
(EE) open /dev/fb0: No such file or directory
2022-11-25T15:10:19.020692-05:00 debian /usr/libexec/gdm-x-session[11179]:
(WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
2022-11-25T15:10:19.020710-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) AMDGPU(0): Creating default Display subsection in Screen section
2022-11-25T15:10:19.020724-05:00 debian /usr/libexec/gdm-x-session[11179]:
#011"Default Screen Section" for depth/fbbpp 24/32
2022-11-25T15:10:19.020738-05:00 debian /usr/libexec/gdm-x-session[11179]:
(==) AMDGPU(0): Depth 24, (--) framebuffer bpp 32
2022-11-25T15:10:19.020752-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) AMDGPU(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
2022-11-25T15:10:19.020766-05:00 debian /usr/libexec/gdm-x-session[11179]:
(==) AMDGPU(0): Default visual is TrueColor
2022-11-25T15:10:19.020779-05:00 debian /usr/libexec/gdm-x-session[11179]:
(==) AMDGPU(0): RGB weight 888
2022-11-25T15:10:19.020793-05:00 debian /usr/libexec/gdm-x-session[11179]:
(II) AMDGPU(0): Using 8 bits per RGB (8 bit DAC)
2022-11-25T15:10:19.020807-05:00 debian /usr/libexec/gdm-x-session[11179]:
(--) AMDGPU(0): Chipset: "AMD Radeon RX 6500 XT" (ChipID = 0x743f)


On Fri, Nov 25, 2022 at 2:58 PM Salvatore Bonaccorso <carnil@debian.org> wrote:

https://linux-hardware.org/?probe=51cf6d10e7

To reiterate this system is mostly working but headless.
The only monitor I can get to work is a smart TV, dumb DP displays show no
output neither does dumb tv.

The screen goes blank shortly into booting

Thanks,
Tim

I bought a new monitor, confirming that it works.
The problem seems to be with older devices.